Bests & Worsts Reviews from Amazon

We remodeled our house 3 years ago. We have 11 of these smoke alarms connected to our ADT alarm system. We have had the fire department out 6 times because of false positives (we are on vacation) and have been awakened well over 15 times because these have false positives. 1) Initially, they went off because they were too close to furnaces outputs. Mild shaking or subtle heat change set them off. We had to move two of them after months of trying to figure out the issue. Worth noting, we had other alarms in the same spot before the remodel without issue (but those weren't hooked to our alarm system). 2) 3 years after purchase the units are just dying. We have already replaced 3 of them. Before they die, you guessed it. Full alarms 3 a.m. 3) One more problem with the alarms is that the batteries die out quickly. We change ours every 5 months on the mark. 4) The MOST annoying problem however is that it is impossible to tell which alarm is dying or out of batteries. Only our ADT panel chirps. To find out if one is dying you have to go under each alarm, wait for a red flash and then count to 40. If it flashes before 40 seconds, you need to replace the battery (or it is a dud alarm). We have 11 of these things. BUT even if you have 5, you don't want to waste the time standing under them counting to 40. These have really a DUMB battery notification system. Terrible. We are replacing them all soon. We (and our fire department) have had enough. Seriously. Who wants to worry and deal with this stuff. Not me.